public void Validate_Equality_Operator_Is_Equal_Null_Objects() { //Arrange var contreteEntityA = new ConcreteEntity("SOMEVALUE_1"); ConcreteEntity contreteEntityB = null; ConcreteEntity contreteEntityC = null; //Act var result1 = (contreteEntityA == contreteEntityB); var result2 = (contreteEntityB == contreteEntityC); var result3 = (contreteEntityA == contreteEntityC); var result4 = (contreteEntityB == contreteEntityA); //Assert Assert.False(result1); Assert.True(result2); Assert.False(result3); Assert.False(result4); }